CN203066882U - High-strength arc angle triquetrum drill rod - Google Patents

High-strength arc angle triquetrum drill rod Download PDF

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Publication number
CN203066882U
CN203066882U CN 201320036325 CN201320036325U CN203066882U CN 203066882 U CN203066882 U CN 203066882U CN 201320036325 CN201320036325 CN 201320036325 CN 201320036325 U CN201320036325 U CN 201320036325U CN 203066882 U CN203066882 U CN 203066882U
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China
Prior art keywords
rod
thread joint
drilling
drilling rod
high strength
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CN 201320036325
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Chinese (zh)
Inventor
田东庄
许翠华
董萌萌
龚城
燕南飞
王渤
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Xian Research Institute Co Ltd of CCTEG
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Xian Research Institute Co Ltd of CCTEG
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Abstract

The utility model relates to a high-strength arc angle triquetrum drill rod which is used for wind pressure drilling of a floppy outburst coal seam gas extraction drill hole. The high-strength arc angle triquetrum drill rod comprises a rod body (1), a male screwed joint (2) and a female screwed joint (3), wherein the male screwed joint (2) and the female screwed joint (3) are welded at two ends of the rod body (1) respectively in a friction manner; a through hole is formed in the drill rod; and the outer periphery of an axial cross section of the drill rod comprises three straight lines (4) and three arcs (5) which have equal lengths respectively and are connected alternately. The drill rod has simple structure, convenience in manufacture, high strength, strong screw thread carrying capacity, excellent coal stirring effect, and long service life.

Description

High strength arc chord angle triangular drilling rod
Technical field
The utility model relates to the drilling machinery apparatus field in colliery, relates in particular to a kind of high-intensity high strength arc chord angle triangular drilling rod that has that is applicable to that soft projecting coal bed mash gas pumping drilling blast drilling construction uses.
Background technology
Soft projecting coal bed mash gas pumping drilling construction is the difficult problem of puzzlement China tunnel drilling technique development always, adopts outer flush drill stem and auger stem to carry out drilling construction in the prior art usually.
Outer flush drill stem is in drilling process, and drilling rod is little to coal dust disturbance in holing, and can not be with outside the effective tap of coal dust, has problems such as drilling depth is limited in soft projecting coal bed mash gas pumping drilling construction; Auger stem is in drilling process, improved drilling ability and deslagging ability, but drilling rod is excessive to the hole wall disturbance, spray orifice takes place easily, anomaly such as the hole of collapsing, bit freezing, cause that the Completion of Drilling Hole rate is low, depth of pore forming is shallow, when serious even drilling accident such as drilling rod occurs falling.
In recent years, a lot of mines adopt the triangle drilling rod to carry out soft projecting coal bed mash gas pumping drilling construction, have improved one-tenth porosity and the depth of pore forming of soft projecting coal bed mash gas pumping drilling to a great extent.But triangle drilling rod in the market generally adopts the arc welding mode that male joint and female joint are welded on body of rod two ends, and drilling rod intensity is low, and quality stability is poor, and limit by structure, and drill rod thread intensity is low, very easily occurs falling accidents such as brill in the process of drilling.
For this reason, designer of the present utility model is because above-mentioned defective by concentrating on studies and designing, comprehensively is engaged in for a long time experience and the achievement of related industry for many years, and research and design goes out a kind of high-intensity high strength arc chord angle triangular drilling rod that has, to overcome above-mentioned defective.
Summary of the invention
The purpose of this utility model is to provide a kind of high strength arc chord angle triangular drilling rod, and it is simple in structure, and is easily manufactured, and drilling rod intensity height, screw thread supporting capacity are strong, and stir effective, the long service life of coal.
For achieving the above object, the utility model discloses a kind of high strength arc chord angle triangular drilling rod, it is used for soft projecting coal bed mash gas pumping drilling blast drilling construction, it is characterized in that comprising the body of rod 1, male thread joint 2 and box thread joint 3, this male thread joint 2 and box thread joint 3 are welded on the two ends of the body of rod 1 respectively by the friction welding mode, have through hole in the drilling rod, the axial cross section outer peripheral shape of drilling rod alternately is formed by connecting by three sections isometric straightways 4 and arc section 5.
Wherein: the body of rod 1 is stock shape, and its two ends are the plane, and an end of this male thread joint 2 is the plane, is fixedly connected on a transverse plane of the body of rod 1 by friction welding, and its other end is external thread section; One end of this box thread joint 3 is the plane, is fixedly connected on the other end plane of the body of rod 1 by friction welding, and its other end is internal thread segment.
Wherein: male thread joint 2 and box thread joint 3 align with the phase place of the body of rod 1.
Wherein: many drilling rods are by after being threaded, and the phase potential energy of each drilling rod axial cross section aligns substantially, and straightway becomes the plane vertically, and arc surface becomes arc surface vertically.
Wherein: the end of male thread joint 2 and root are provided with circular bead surface respectively, conical bore bottom and end at described box thread joint 3 also are provided with circular bead surface respectively, after two drilling rods connected, male and female nipple four circular bead surfaces under the effect of pretightning force had formed two fitting faces 6 and 7 of tight contact.
Wherein: the internal thread segment of the external thread section of male thread joint 2 and box thread joint 3 is isometric.
By said structure, high strength arc chord angle triangular drilling rod of the present utility model has following technique effect:
1, adopt the Double Tops structure, two antitorque shoulders are provided, the total contact area of its shoulder is much larger than common drilling rod, thereby the moment of torsion that bears is also much larger than common drilling rod, and be improved the application life of drilling rod;
2, the dual-top type structure makes and creeps into scouring media and leak from inside to outside and need through two sealing surfaces, and leak resistance is big, can more effectively prevent from creeping into the leakage of scouring media, good sealing effect.Improve torsional strength and the fatigue strength of tool joint greatly, reduced the screw thread thread gluing, the box thread joint swells and male thread joint breaking equivalent risk;
3, cross section adopts three sections arc sections and triangle section alternately to be formed by connecting, utilize the seamed edge design of triangle section, drilling rod can stir the ickings of precipitation at the bottom of the hole when rotated, when creeping in the coal seam, more row's powder space is provided, can be with coal dust fast and effeciently outside the evacuation aperture;
4, adopt the friction welding mode to be welded, improved the weld strength of drilling rod.
Detailed content of the present utility model can obtain by explanation described later and institute's accompanying drawing.
Description of drawings
Fig. 1 has shown the structural representation of the utility model high strength arc chord angle triangular drilling rod;
Fig. 2 has shown that the male joint of the utility model high strength arc chord angle triangular drilling rod and female joint cooperate schematic diagram.
The specific embodiment
Referring to Fig. 1, the structural representation that has shown the utility model high strength arc chord angle triangular drilling rod, it is used for soft projecting coal bed mash gas pumping drilling blast drilling construction, this high strength arc chord angle triangular drilling rod, comprise the body of rod 1, male thread joint 2 and box thread joint 3, this male thread joint 2 and box thread joint 3 are welded on the two ends of the body of rod 1 respectively by the friction welding mode, has through hole in the drilling rod, and wherein, the axial cross section outer peripheral shape of drilling rod alternately is formed by connecting by three sections isometric straightways 4 and arc section 5, thereby form the triangle structure of symmetry, three bights of this triangle structure have the arc transition section 5 of same circle.
Wherein, the body of rod 1 is stock shape, and its two ends are the plane, and an end of this male thread joint 2 is the plane, is fixedly connected on a transverse plane of the body of rod 1, the lobed external thread section of its other end by friction welding; One end of this box thread joint 3 is the plane, is fixedly connected on the other end plane of the body of rod 1 by friction welding, and its other end has recessed internal thread segment.
At needs during than long drill pipe, can be threaded by external thread section and internal thread segment by many drilling rods of the present utility model, the phase place of the axial cross section of each drilling rod is aligned, straightway is along plane of axial one-tenth of whole drilling rod, and arc surface is then along arc surface of axial one-tenth of whole drilling rod.
In order to improve bonding strength, male thread joint 2 is provided with circular bead surface respectively at the root of the end with external thread section and male end, internal thread segment bottom at described box thread joint 3 also is provided with circular bead surface respectively with the end with internal thread, and the length of external thread section and internal thread segment is identical, therefore, after two drilling rods interconnected, the male and female nipple was under the effect of pretightning force, and four circular bead surfaces have formed two fitting faces 6 and 7 of tight contact.
Thus, high-intensity arc chord angle triangular drilling rod of the present utility model is welded by the body of rod and male thread joint, box thread joint three partial frictional.Each several part cross-sectional circumference limit shape alternately is formed by connecting by three sections isometric straightways and arc section respectively.The male and female nipple adopts the Double Tops structure, and two antitorque shoulders are provided, and has improved torsional strength and the fatigue strength of tool joint greatly, has reduced the screw thread thread gluing, the box thread joint swells and male thread joint breaking equivalent risk.Drilling rod is in weak seam gas pumping drilling process, and the air quantity with certain pressure enters by drill pipe bore at the bottom of the hole, coal dust in arc chord angle triangular drilling rod revolution disturbance, the poke hole, and reflux pressure wind coal dust carries outside sky, realizes the cherry coal mash gas pumping drilling construction.
It is evident that above description and record only are for example rather than in order to limit disclosure of the present utility model, application or use.Though described and be described in the drawings embodiment in an embodiment, but the optimal mode that the utility model does not limit by the accompanying drawing example and the conduct of describing is in an embodiment thought at present to be implementing the specific examples of instruction of the present utility model, and scope of the present utility model will comprise any embodiment of the manual that falls into the front and appended claim.

Claims (6)

1. high strength arc chord angle triangular drilling rod, it is used for soft projecting coal bed mash gas pumping drilling blast drilling construction, it is characterized in that comprising the body of rod (1), male thread joint (2) and box thread joint (3), this male thread joint (2) and box thread joint (3) are welded on the two ends of the body of rod (1) respectively by the friction welding mode, have through hole in the drilling rod, the axial cross section outer peripheral shape of drilling rod alternately is formed by connecting by three sections isometric straightways (4) and arc section (5).
2. high strength arc chord angle triangular drilling rod as claimed in claim 1, it is characterized in that: the body of rod (1) is stock shape, and its two ends are the plane, and an end of this male thread joint (2) is the plane, be fixedly connected on a transverse plane of the body of rod (1) by friction welding, its other end is external thread section; One end of this box thread joint (3) is the plane, is fixedly connected on the other end plane of the body of rod (1) by friction welding, and its other end is internal thread segment.
3. high strength arc chord angle triangular drilling rod as claimed in claim 1 is characterized in that: male thread joint (2) and box thread joint (3) align with the phase place of the body of rod (1).
4. high strength arc chord angle triangular drilling rod as claimed in claim 1, it is characterized in that: many drilling rods are by after being threaded, and the phase potential energy of each drilling rod axial cross section aligns substantially, and straightway becomes the plane vertically, and arc surface becomes arc surface vertically.
5. high strength arc chord angle triangular drilling rod as claimed in claim 1, it is characterized in that: end and the root of male thread joint (2) are provided with circular bead surface respectively, conical bore bottom and end at described box thread joint (3) also are provided with circular bead surface respectively, after two drilling rods connected, male and female nipple four circular bead surfaces under the effect of pretightning force had formed two fitting faces (6,7) of tight contact.
6. high strength arc chord angle triangular drilling rod as claimed in claim 3, it is characterized in that: the internal thread segment of the external thread section of male thread joint (2) and box thread joint (3) is isometric.
CN 201320036325 2013-01-23 2013-01-23 High-strength arc angle triquetrum drill rod Active CN203066882U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320036325 CN203066882U (en) 2013-01-23 2013-01-23 High-strength arc angle triquetrum drill rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320036325 CN203066882U (en) 2013-01-23 2013-01-23 High-strength arc angle triquetrum drill rod

Publications (1)

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CN203066882U true CN203066882U (en) 2013-07-17

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103758507A (en) * 2014-02-19 2014-04-30 中煤科工集团重庆研究院有限公司 Signal transmission structure and method of drill pipe
CN103806933A (en) * 2014-01-27 2014-05-21 冀中能源峰峰集团有限公司大淑村矿 High-stress soft outburst coal seam mining method
CN109750991A (en) * 2018-12-27 2019-05-14 河南龙腾新型钻具制造有限公司 The self-unloading structure of a kind of high-efficiency helical self-unloading drilling rod and from discharging method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103806933A (en) * 2014-01-27 2014-05-21 冀中能源峰峰集团有限公司大淑村矿 High-stress soft outburst coal seam mining method
CN103806933B (en) * 2014-01-27 2016-07-06 冀中能源峰峰集团有限公司大淑村矿 Heavily stressed soft projecting coal bed recovery method
CN103758507A (en) * 2014-02-19 2014-04-30 中煤科工集团重庆研究院有限公司 Signal transmission structure and method of drill pipe
CN103758507B (en) * 2014-02-19 2017-02-15 中煤科工集团重庆研究院有限公司 Signal transmission structure and method of drill pipe
CN109750991A (en) * 2018-12-27 2019-05-14 河南龙腾新型钻具制造有限公司 The self-unloading structure of a kind of high-efficiency helical self-unloading drilling rod and from discharging method

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Owner name: XI'AN RESEARCH INSTITUTE OF CHINA COAL TECHNOLOGY

Free format text: FORMER NAME: CHINA COAL TECHNOLOGY + ENGINEERING GROUP XI'AN RESEARCH INSTITUTE

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Address after: 710077 Xi'an high tech Zone, Shaanxi Jin Industry Road, No. 82

Patentee after: Xi'an Research Institute, CCTEG

Address before: 710077 Xi'an high tech Zone, Shaanxi Jin Industry Road, No. 82

Patentee before: China Coal Technology & Engineering Group Xi'an Research Institute

CP01 Change in the name or title of a patent holder